Hear them coming with these nipple clamps! These tweezers style nipple clamps have a bell attached to the tip that produce a low sound. The clamps are provided with a layer of vinyl for a soft feeling. The slidable ring can be adjusted to determine the pressure. These great clamps are for beginners as well as advanced. They are also perfectly suited for humiliation, and can be used to quickly find your sub. Can be used on the balls, penis, nipples and labia